Genus (Claparède and Lachmann, 1858):
Ovoid or cylindrical; apical cytopharynx; posterior bald; caudal cilia present;
contractile vacuole posterior (Carey, 1992).
Species:
Urotricha farcta ?,
cell body 29 μm long, 21 μm wide, L/W=, a single caudal cilium 11 μm long,
x 640, Onnenai, Kushiro marsh, Kushiro city, Hokkaido, Japan, October 16, 2005 by Y. Tsukii
31 μm
63 μm
94 μm; x 640